Following the run of videos, some trolls on the Internet have come back at the fit actor, saying that he’s looking too thin and even “skeletal” due to his weight loss. In perfect Pratt fashion, the actor took to Instagram to clap back at his detractors:

Pratt's not alone in taking on body shamers, though. Even though body shaming is often directed at people who have gained weight, people who lose weight also face implicit criticism from even their friends and families—a challenge called "lean shaming." In the North Carolina State study, every one of the study participants—who had lost an average of 77 pounds—said "people in their lives tried to belittle or undermine their weight loss efforts," the researchers said.